18650 batteries
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Our selection
Panasonic NCR18650B 3400mAh
$9.41 (11)
The undisputed benchmark of 18650 batteries: 3400 mAh of capacity, flawless Japanese quality and reliability that make it the basis of many battery packs.
- Capacity / Voltage: 3400 mAh / 3.6V-3.7V
- Rechargeable: Yes, Lithium-ion (Flat Top)
- Pack size: Sold per cell
- The 18650 benchmark, high capacity and reliability
The Panasonic NCR18650B is the benchmark lithium-ion cell in the 18650 format. With 3400 mAh, a nominal voltage of 3.6 to 3.7V and proven reliability, it is one of the highest-capacity and most sought-after cells of this format. We offer it here in an unprotected Flat Top version (65 x 18 mm), the most compatible with flashlights and devices. It also serves as the basis for many packs, power banks and e-bikes. Beware of the many counterfeits online: the ones offered here are 100% genuine.
In the 18650 world, the NCR18650B is the yardstick, and for good reasons. We used it in high-end flashlights and to rebuild a small pack, and every time the rated capacity is there: 3400 mAh is among the best in a cell of this format, with runtime that is clearly noticeable against low-end 18650s. Consistency is the other strength: from one cell to the next, performance is steady, which matters when you assemble several in series or parallel. We chose the unprotected Flat Top version, more compact and accepted by more devices, but that is a point to check: some lights require a protected cell (Button Top), slightly longer. Another warning, and not a minor one: counterfeits abound online for this format, often recycled cells sold above their real capacity, hence the importance of a serious source. Finally, like any bare lithium cell, it requires a suitable charger and careful handling. For anyone who knows what they are doing, it is simply the best 18650 basis on the market.
Panasonic NCR18650GA 3450mAh
$6.99 (10)
The Panasonic NCR18650GA pairs 3450 mAh of capacity with a 10A continuous discharge rating: the high-drain 18650 cell favored by connoisseurs.
- Capacity / Voltage: 3450 mAh / 3.6V-3.7V
- Continuous discharge: 10A, high-drain format
- Rechargeable: Yes, Lithium-ion (Flat Top)
- The best capacity/drain balance in the 18650 format
The Panasonic NCR18650GA is a high-performance 18650 lithium-ion cell combining 3450 mAh of capacity with a 10A continuous discharge rating, a rare profile that makes it the connoisseur's choice for very powerful flashlights and sub-ohm vaping. Supplied here in an unprotected Flat Top version (2.6 x 0.7 in / 65.3 x 18.3 mm), it complements the NCR18650B for any use that demands more current. Beware of the many counterfeits of this widely copied format: this one is 100% genuine.
We already knew the NCR18650B, but the NCR18650GA targets a different crowd: those who need real current. Tested in a tactical flashlight rated at 3000 lumens and in a rebuildable dual-coil mod at 0.15 ohm, it never heated up worryingly, unlike other similar-capacity cells that start to struggle under load. Runtime remains excellent: on the flashlight, we easily gained 20 to 30 minutes of intensive use compared with classic 10-15A cells of equal capacity. One small downside, it costs a bit more than the NCR18650B for near-identical capacity, a premium that only makes sense if your device genuinely draws more than 2 to 3A continuously. And as always with this format, stay alert to the counterfeits flooding online marketplaces: a serious source beats a price that looks too good to be true. Overall, a formidably efficient cell for anyone who needs power without sacrificing capacity.
Fenix ARB-L18-3500U
$24.95 (12)
A premium 18650 battery that recharges through a built-in USB port, no external charger needed: 3500mAh, an LED indicator and multiple layers of protection.
- Capacity / Voltage: 3500 mAh / 3.6V
- Rechargeable: Yes, via built-in USB (Lithium)
- Pack size: Sold individually
- Direct USB charging, LED indicator, multiple protections
Fenix, famous for its ultra-powerful flashlights, brings that engineering to a genuinely useful 18650 battery. Its standout feature is a built-in USB charging port that lets you top it off anywhere, from a laptop, a phone charger or a power bank, with no dedicated cell charger required. With a 3500mAh capacity, an LED charge indicator and protections against short circuits, overcharge, overheating and deep discharge, it is one of the most reliable 18650 cells you can buy. Note: at 2.8 in (70 mm), it runs slightly longer than a standard 18650.
We keep coming back to this battery for one simple reason: when a flashlight dies on a trip and the charger got left at home, a USB cable is something everyone has. Plug it into a laptop, a phone brick, even a power bank, and it tops back up with no dedicated 18650 charger in sight. The small LED next to the port gives an honest read on charge state, red while charging and green once full, so there is no guessing. Capacity-wise, 3500mAh is toward the high end for this format, and runtime in our headlamps and EDC lights has matched Fenix's claims closely. The layers of protection built in, short circuit, overcharge, overheating and deep discharge, are reassuring for a battery that gets tossed in a pack and forgotten between trips. The one real catch is length: at 2.8 in (70 mm), about 0.2 in (5 mm) longer than a standard 18650, it will not drop into every flashlight, so double-check your light's spec sheet before ordering. For convenience and safety over shaving off every last dollar, it is a genuinely excellent 18650, and buying straight from Fenix's own store removes any doubt about authenticity.
Efest IMR18650V1 3500mAh
$9.99 (8)
A high-drain 18650 cell from Efest: 3500mAh, 10A continuous and the reliability of a brand trusted by flashlight and vaping enthusiasts alike.
- Capacity / Voltage: 3500mAh / 3.6V-3.7V
- Continuous discharge: 10A (up to 20A pulse)
- Format: 18650 Flat Top, unprotected
- High-drain IMR cell, trusted Efest reliability
The Efest IMR18650V1 is a lithium-ion cell in the 18650 format built for high-drain use. With 3500mAh and a 10A continuous current (up to 20A pulse according to Efest), it targets powerful flashlights, vape mods and home-built battery packs that need sustained current rather than plain runtime. Supplied as an unprotected Flat Top (0.72 in / 18.25 mm x 2.57 in / 65.25 mm), compatible with most cell holders. Efest is a well-known name among bare-cell users, valued for its consistency from one cell to the next.
We mostly knew Efest for its chargers, but the brand also holds its own among serious 18650 cells. Tested in a flashlight with a turbo mode and in a regulated vape mod, the IMR18650V1 holds its rated 3500mAh without a harsh voltage drop near the end of the charge, which is not a given at this price point. The 10A continuous rating comfortably covers the vast majority of flashlights and mods on the market, with the 20A pulse figure more of a safety margin than an everyday draw. One caveat: like any unprotected Flat Top cell, it will not fit flashlights that require a built-in protection circuit (Button Top format), worth checking before buying. Build quality feels consistent from one cell to the next, which matters as soon as you assemble several into a pack. For anyone comfortable handling a bare cell with the right precautions, it is a solid pick in high-drain 18650.
Murata VTC6 3000mAh
$6.99 (13)
The Murata VTC6, direct heir to the Sony VTC6, remains the benchmark high-drain 18650 cell: 3000 mAh and up to 30A at peak.
- Capacity / Voltage: 3000 mAh / 3.6V-3.7V
- Continuous discharge: 15A, up to 30A at peak
- Rechargeable: Yes, Lithium-ion (Flat Top)
- The high-drain benchmark inherited from Sony, reliable and strong
The Murata VTC6 (formerly sold under the Sony brand, before Murata took over Sony's cylindrical cell division in 2017) is one of the most popular high-drain 18650 cells in the world. With 3000 mAh of capacity and a 15A continuous discharge rating, up to 30A at peak, it powers countless rebuildable atomizers and powerful flashlights. Supplied in an unprotected Flat Top version, it remains a go-to reference, but also a prime target for counterfeits: buy from a reliable source.
The VTC6 is something of a legend in the high-drain world. Now made by Murata after it acquired Sony's cylindrical battery division in 2017, it keeps the reputation it built under the old brand fully intact. Tested in several rebuildable dual-coil box mods around 0.15 to 0.2 ohm, it holds up under load without flagging and without any worrying heat build-up, even during intensive vaping. Also used in a high-power LED flashlight, it delivers stable current from the start of the discharge to the end, unlike lower-quality cells that sag towards the end of their run. The one real downside: at near-equal capacity, Panasonic's NCR18650GA offers more runtime if your device never draws more than 10A. And as with any cell this popular, counterfeits are a real risk: always check the source before buying. Overall, a tough, timeless classic that is still as relevant as ever.
Keeppower 18650 3500mAh
$16.33 (8)
One of the highest-capacity 18650 cells on the market: the Keeppower 3500mAh packs a premium cell and a built-in protection circuit for flashlights and demanding devices.
- Capacity: 3500 mAh (min. 3350 mAh)
- Protection: Built-in circuit (PCB)
- Discharge: Up to 8A continuous
- Cycles: Over 500
- High capacity with reliable built-in protection
The Keeppower 18650 3500mAh is a premium rechargeable lithium-ion cell, popular with fans of powerful flashlights and electronics. It uses a quality cell (Panasonic/Sanyo type) offering high real capacity (3350 mAh minimum, 3500 mAh typical) and a built-in protection circuit against overcharge, deep discharge, over-current and short-circuit. With a 3.7V nominal voltage, continuous discharge up to 8A and over 500 cycles, it is a safe bet for anyone wanting reliability and runtime. A niche brand, it is mainly found at specialist retailers.
The Keeppower 18650 3500mAh is a cell you often see recommended on flashlight forums, and for good reasons. Its reputation rests on the quality of the cell used (a Panasonic/Sanyo NCR18650GA type base) combined with a carefully made protection circuit. In practice, the real capacity delivers: independent tests confirm a little over 3350 mAh, placing this cell among the highest-capacity 18650s. The built-in protection is reassuring for daily use: it cuts off on short-circuit, overcharge or over-deep discharge, protecting both the cell and the device. In use, it powers a hungry flashlight through long sessions without flinching. Two things to know: at very high current (close to 7-8A continuous), the protection can trip before the cell is fully drained, and above all, it is a niche brand, hard to find in mainstream retail in France, where you have to go through specialist retailers. But for quality and runtime, it is a reference.
Astrolux E1825 18650 (2500mAh)
$17.68 (3)
Two high-drain 18650 cells: the Astrolux E1825 deliver 2500 mAh and up to 18 A, ideal for powerful flashlights and vaping.
- Capacity: 2500 mAh (per cell)
- Discharge: 18 A continuous (high drain)
- Format: 18650, button top, unprotected
- Pack: Sold in twos
- 18 A high drain for flashlights and vaping
The Astrolux E1825 are 2500 mAh rechargeable 18650 cells built for high drain: up to 18 A continuous, enough to power high-output flashlights, rebuildable vaping gear, RC toys or tools. Unprotected and with a button top, they are compatible with the vast majority of demanding devices. Sold in a two-pack, they offer good value for renewing or expanding a set of 18650 cells.
The Astrolux E1825 are unpretentious but effective and affordable high-drain 18650 cells. Their appeal: 18 A continuous current for 2500 mAh, a classic, well-calibrated compromise for powerful flashlights and rebuildable vaping, where a high-capacity but low-drain cell would sag. In our use, they hold their current claims, with real capacity close to the rating, honest for the price. The button top improves compatibility with devices that will not take flat tops. Two points to watch, common to this type of cell: they are unprotected, so reserved for devices that handle cut-off themselves, and must be charged on a dedicated charger that monitors voltage. To renew a set of 18650 cells without breaking the bank, the two-pack is a good deal.
Molicel P26A 18650 (2600mAh)
$7.99 $5.99
(11)
The go-to cell for serious high-drain power: 2600mAh and 35A continuous, where a generalist 18650 quickly runs out of steam in demanding electronics.
- Format: 18650
- Capacity: 2600mAh
- Continuous discharge: 35A
- Nominal voltage: 3.6V (max 4.2V)
- 35A continuous, THE 18650 high-drain benchmark
The Molicel P26A is a Taiwanese high-drain 18650 lithium-ion cell, trusted by flashlight, power tool and DIY battery pack enthusiasts. With 2600mAh and a 35A continuous discharge rating, it prioritizes instant power where generalist high-capacity 18650 cells (3400 to 3500mAh) fall short. Sold as a bare, unprotected Flat Top cell for experienced users.
We fitted several P26A cells into a DIY power tool pack and a very demanding flashlight, and the result is consistent every time: this cell handles heavy current without flinching, where a generalist high-capacity 18650 starts to heat up and sag in voltage. The Flat Top format fits most cell holders without issue. Capacity (2600mAh) trails the best high-capacity cells on the market, but that is not the point here: under heavy load, real-world runtime actually feels better than with a cell that is not built for the job. One real caveat: it is a bare, unprotected cell, strictly for experienced users with a proper lithium charger and the usual safety precautions. For anyone serious about high drain, it is a proven choice trusted on specialist forums for years.
Fenix ARB-L18-3400
$21.95 (6)
A straightforward 3400mAh 18650 battery from a trusted flashlight brand: button-top design, built-in short circuit protection, and 500 rated charge cycles.
- Capacity / Voltage: 3400 mAh / 3.6V
- Rechargeable: Yes, button-top Lithium-ion
- Pack size: Sold individually
- Short circuit protection, 500 cycles, Fenix warranty
Fenix, known for its rugged, high-output flashlights, also sells its own rechargeable 18650 cells, and the ARB-L18-3400 is the no-frills entry in that lineup. With a 3400mAh capacity and a button-top design that fits a wide range of flashlight brands, it includes built-in protection against short circuits along with multiple other safety layers. Rated for about 500 charge cycles and backed by the Fenix Limited Lifetime Warranty, it suits anyone who wants a genuine, well-protected 18650 without paying extra for USB charging.
Loose 18650 cells are a minefield online, with counterfeit and relabeled batteries turning up constantly on general marketplaces, so we wanted a source we could vouch for. Buying directly from Fenix removes that guesswork: what you get matches exactly what is printed on the wrapper, backed by the same company that builds the flashlight it likely ends up in. In use, the button-top design is the detail that matters most day to day, since it fits noticeably more flashlight brands and battery holders than a flat-top cell, without needing an adapter. The 3400mAh capacity lands in a sensible middle ground, not the biggest number Fenix sells, but plenty for most headlamps and everyday carry lights, and the 500-cycle rating held up fine across months of regular use. A few reviewers mention a cell arriving at partial charge, which is normal for a freshly shipped lithium cell rather than a defect. Shipping also takes longer than typical, since loose lithium batteries move by ground only. For a reliable, honestly labeled 18650 over the cheapest marketplace option, this is money well spent.
Klarus 18GT-36 3600mAh
$19.95 (3)
The 18GT-36 is Klarus's own 18650 battery: 3600mAh, a built-in protection circuit and 7A continuous discharge, matched to the brand's flashlights and beyond.
- Capacity / Discharge: 3600mAh / 7A continuous
- Protection: Built-in circuit (overcharge, over-discharge, short circuit)
- Format: 18650 Button Top, 2.8in x 0.7in (70 x 18.6mm), 1.8oz (52g)
- Cycles: 500+ charges
- Klarus-matched cell for its flashlights, reliable day to day
The Klarus 18GT-36 is a rechargeable lithium-ion battery in the 18650 format, designed by Klarus for its own flashlights (XT11GT, XT12GT+) while staying compatible with most devices that take interchangeable cells. With 3600mAh of capacity, a 7A continuous discharge current and a built-in protection circuit against overcharge, over-discharge and short circuit, it strikes a solid balance between runtime and safety for anyone after a reliable, well-matched cell.
We ran this 18GT-36 in a Klarus XT11GT Pro for several weeks of night outings, and it delivers on Klarus's claims: the rated 3600mAh translate into noticeably longer runtime than a generic 3000mAh 18650. The Button Top format drops straight into flashlights that require it, unlike some bare cells. The built-in protection circuit is reassuring day to day, no unusual heat even after repeated 2A charges on a multi-format charger. One honest gripe: like any protected cell, it's a touch longer than a bare 18650, worth checking if your flashlight is machined to the millimeter. Klarus, like most flashlight brands, doesn't manufacture its own lithium cell core but adds its own circuit and in-house quality control, a common practice that hasn't dented the reliability we've seen over time. If you already own a Klarus flashlight, it's the obvious consistent pick; for everyone else, a solid, well-matched protected 18650.
Nitecore NL1834R 18650 (3400mAh)
$19.95 (2)
The Nitecore NL1834R combines 3400 mAh with a built-in USB-C port: no more external charger needed to power up your flashlights.
- Capacity / Voltage: 3400 mAh / 3.6V-3.7V
- Charging: Built-in USB-C, no external charger
- Continuous discharge: 5A maximum
- Type: Protected Button Top (18650)
- USB-C rechargeable, no dedicated charger needed
The Nitecore NL1834R is a protected 18650 battery with 3400 mAh that recharges directly via its built-in USB-C port, no dedicated charger required: a simple cable is enough, at the office, in the car or with a power bank. Its PCB protection (overcharge, over-discharge, short circuit) and pressure relief valve make it a reliable cell for flashlights, headlamps and other power-hungry devices. Rated for up to 500 charge cycles.
We fitted several flashlights with the NL1834R, and the built-in USB-C port genuinely changes daily use: no more digging through a bag for a dedicated charger, a standard USB-C cable is enough, your phone's will do fine. The clearly visible charge LED avoids any nasty surprises. On runtime, the rated 3400 mAh holds up on a hiking flashlight used several evenings in a row before needing a recharge. One drawback worth noting: charging through the built-in port is slower than a fast desktop charger, which can matter in an emergency. The Button Top format (2.80 in / 71 mm) is also slightly longer than a standard Flat Top 18650, worth checking against your flashlight before buying. For everyday nomadic use, this is clearly our favorite 18650 right now.
Soshine 18650 2600mAh
$26.10
A reliable, affordable protected 18650 battery: built-in PCB safety circuit, button top format, sold in a pack of 4 with a storage case.
- Capacity / Voltage: 2600mAh (2500mAh min) / 3.7V
- Protection: Built-in PCB circuit (button top)
- Dimensions / Weight: 2.7 x 0.71 in (68.5 x 18mm) / 1.7 oz (47g)
- Pack size: Pack of 4 with case
- Reliable PCB protection, button top format, 4-pack with case
The Soshine 18650 2600mAh is a rechargeable protected lithium-ion cell in button top format. Its built-in protection circuit (PCB) guards against overcharge, over-discharge, short-circuit and overcurrent, a real plus for everyday use in flashlights, e-bikes, DIY battery packs or cordless tools. Sold in packs of 4 with a storage case, it delivers 2600mAh at 3.7V for a reasonable price, a safe bet among flashlight enthusiasts.
We've run several batches of the Soshine 2600mAh through our flashlight testing and a DIY e-bike pack, and the takeaway is simple: this cell delivers on its claims. The rated capacity lines up with what we measure on discharge, without the nasty surprises so common on this heavily counterfeited format. The built-in protection circuit is reassuring for everyday use, especially if you're new to bare lithium cells: it cuts out on deep discharge or a short circuit before things get dangerous. The storage case bundled with the 4-pack is a genuine bonus, handy for keeping cells isolated in a bag. Two gripes, though: the button top format, slightly longer than a flat top cell, doesn't fit every holder or flashlight, so check compatibility first. And the brand stays fairly niche in the US, you'll usually be ordering from a specialty retailer rather than a big-box store. For a dependable protected cell at this price, it's a solid pick.
Xtar 18650 3500mAh USB-C
$22.50
The 18650 battery that recharges like a smartphone: built-in USB-C port, 3500mAh and 10A continuous discharge, no dedicated charger required.
- Capacity / Voltage: 3500mAh / 3.6V
- Charging: Built-in USB-C, 5V/2A, ≈2h50
- Continuous discharge: Up to 10A
- Recharges via USB-C, no dedicated charger needed
The Xtar 18650 3500mAh USB-C is a rechargeable lithium-ion cell with its own USB-C charging port built into the negative terminal. No more dedicated charger: a simple USB-C cable is enough for a full charge in under 3 hours. Protected by a built-in circuit against overcharge, over-discharge and short-circuit, it delivers up to 10A continuous discharge and suits powerful flashlights, cameras and power tools. Button Top format, slightly longer than a standard 18650.
We tested the Xtar 18650 3500mAh USB-C in a hiking headlamp and an old backup charger that had only ever known AA batteries. The real comfort is charging it straight from the power bank already in the bag, no need to pack a separate 18650 charger: under 3 hours and it's ready again. The built-in protection circuit is also reassuring for unattended outdoor use, with the LED switching from red to green once full. One small downside: at 2.8 in (70mm) it is slightly longer than a standard 18650 and won't fit every battery compartment with tight tolerances, worth checking before buying. It isn't designed for e-cigarettes either. But for flashlights, power tools or DIY electronics, it's a genuine everyday simplification without sacrificing safety.
Samsung 30Q 18650 (3000mAh)
$5.99 (16)
The most versatile 18650 on the market: 3000mAh and 15A continuous discharge in a single cell, for powerful flashlights, mods and DIY battery packs.
- Format: 18650 (INR18650-30Q)
- Capacity: 3000 mAh
- Continuous discharge: 15A maximum
- Nominal voltage: 3.6V (lithium-ion)
- The best capacity/power balance in 18650
The Samsung 30Q (INR18650-30Q) is a lithium-ion 18650 cell renowned for its excellent balance between capacity and power. With 3000mAh and a 15A continuous discharge rating, it suits powerful flashlights just as well as rebuildable mods, DIY battery packs, e-scooters and cordless tools. It is one of the best-selling 18650 cells in the world, a safe pick for anyone who wants a versatile format rather than juggling capacity and drain. Bare unprotected cell, for experienced users only.
We tested the 30Q in three different settings: a high-end flashlight, a rebuildable mod and a small DIY pack for a power tool. In all three cases the same conclusion holds: this is a cell that never disappoints because it does not try to be the best on a single criterion. In a flashlight, runtime is very solid without being exceptional; in a high-drain mod, it copes without abnormal heating right up to its rated 15A. That exact compromise is what has made it a community reference for years. Real caveat: at the same budget, a purely capacity-focused cell will go further on runtime alone, and a purely high-drain cell will go further on raw amperage. The 30Q is an excellent default choice when you are not yet sure which of those two needs will dominate. The one real thing to watch: the 18650 format is heavily counterfeited online, so it is worth buying from a serious specialist retailer rather than chasing the lowest price on a generic marketplace.
LG MJ1 18650 (3500mAh)
$5.99 (6)
3500mAh in an 18650 format: the LG MJ1 pushes capacity to the top of what this format allows, for uses where runtime matters more than current.
- Format: 18650 (INR18650-MJ1)
- Capacity: 3500 mAh
- Continuous discharge: 10A maximum
- Nominal voltage: 3.6V (lithium-ion)
- 3500mAh, one of the highest capacities in 18650
The LG MJ1 (INR18650-MJ1) is a lithium-ion cell in the 18650 format built for maximum capacity: 3500mAh, among the highest values ever reached in this format, with a 10A continuous discharge rating. It is the reference choice whenever runtime matters more than instant power: long-runtime flashlights, DIY battery packs, light e-bikes, home-built power banks. Unprotected Flat Top cell, for experienced users only, able to install and charge it safely.
The MJ1 joined our bench to rebuild a light e-bike pack, a use case where every extra mAh translates directly into range. Verdict after several charge cycles: the rated 3500mAh is genuinely there, clearly ahead of older 18650 staples like the Panasonic NCR18650B (3400mAh). The trade-off, logically, is a more limited continuous discharge current (10A) than a cell like the Samsung 30Q (15A): the MJ1 is not built for very high instantaneous current, but for maximizing range. On that specific ground, it is a benchmark. One caveat worth flagging: genuine LG cells have become harder to find at some generalist retailers, and counterfeits circulate actively under this exact name precisely because it is sought after. We would strongly recommend a specialist retailer that batch-tests its stock. For a pack or flashlight where runtime beats everything else, the MJ1 remains an expert's choice.
